Convert project from JavaScript to TypeScript Stage

[jpaladin]

No description provided.

[github-actions]

@jpaladin Version should be bumped!

[Copilot]

Pull request overview

This PR migrates the library codebase from JavaScript to TypeScript and updates the build/package outputs to publish both ESM and CJS bundles along with generated type declarations.

Changes:

• Added TypeScript sources (*.ts) and tsconfig.json, removing the hand-written types/index.d.ts.
• Updated Vite library build to emit both index.mjs and index.cjs, and added vite-plugin-dts to generate dist/index.d.ts.
• Updated package metadata (main/module/types/exports) and refreshed related dev dependencies and GitHub Actions versions.

Reviewed changes

Copilot reviewed 11 out of 15 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
vite.config.js	Adds vite-plugin-dts and switches library entry to src/index.ts; outputs both ESM and CJS.
types/index.d.ts	Removes manually maintained declarations in favor of generated typings.
tsconfig.json	Introduces TypeScript compiler configuration for the project.
src/validationFunctions.ts	TypeScript port of validation helpers with JSDoc.
src/validationFunctions.js	Removes the JavaScript implementation after TS migration.
src/useValidation.ts	Adds exported public types (FieldConfig, Field, Fields) and generic hook typing.
src/index.ts	Re-exports runtime APIs and newly exported public types.
src/formUtils.ts	Adds stronger typings (including ExtractedValues) and TS ports of form utilities.
package.json	Updates output entry points and introduces conditional exports; adds TS + dts plugin dev deps.
pnpm-lock.yaml	Locks new/updated dependencies (TypeScript, vite-plugin-dts, etc.).
cypress/components/localRemoteValidation.cy.jsx	Updates imports to align with TS source paths.
.github/workflows/version-check.yml	Updates action version used for PR commenting.
.github/workflows/npm-publish.yml	Updates actions/setup-node major version.
.github/workflows/build.yml	Updates actions/setup-node major version.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

Comments suppressed due to low confidence (1)

src/formUtils.ts:127

• submitForm currently doesn't declare a return type, so TypeScript will infer it as unknown | Promise<unknown> (losing the ability to reflect the actual onSubmit return type and the undefined case when the form is invalid). Consider adding a generic for the submit return type (e.g., <TReturn, ...>(..., onSubmit: (...) => TReturn) => TReturn | Promise<TReturn> | undefined) and typing the new Promise accordingly.

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